SRAM fluoroalkane DomainSwitching PinpointPFM MESA structure Worcester_Polytechnic_Institute ScanningTunnelingMicroscopy frequency_modulation SurfaceChange Workfunction Cell SelfAssembly Step Scratch SFAs NanoLithography CP-AFM phase_change IVSpectroscopy OpticalElement Insulator silicon_oxide self_healing Thermoplastic_polyurethane Tapping non_contact OrganicSemiconductor PANI DataStorage AIN Dr.JurekSadowski NUS_NNI_Nanocore VortexCore PhaseTransition Chemical_Vapor_Deposition